20631380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13397}}^1$

素因数の和:13424

約数の個数: 48

約数和(自身を含む): 54020736

約数和(自身を除く): 33389356

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 13397, 26794, 53588, 66985, 93779, 133970, 147367, 187558, 267940, 294734, 375116, 468895, 589468, 736835, 937790, 1031569, 1473670, 1875580, 2063138, 2947340, 4126276, 5157845, 10315690, 20631380]

約数ペア:

[(1, 20631380), (2, 10315690), (4, 5157845), (5, 4126276), (7, 2947340), (10, 2063138), (11, 1875580), (14, 1473670), (20, 1031569), (22, 937790), (28, 736835), (35, 589468), (44, 468895), (55, 375116), (70, 294734), (77, 267940), (110, 187558), (140, 147367), (154, 133970), (220, 93779), (308, 66985), (385, 53588), (770, 26794), (1540, 13397)]